Yes.... and no. I think we can use them to figure out how many squadrons a world can support. But that's not the interesting question.
And... I think RU gives you advantage, sometimes overwhelmingly so, but I think there are subtleties that numbers can't measure -- leadership, a veteran team, and opportunity.
Consider three demands of empire: Diplomacy, Economics, War. Consider how we resolve each of these. They are task-driven, but there are different actors for each.
Diplomats might be ambassadors and embassies, or other interesting personalities. They might use Interpersonal tasks straight out of the T5 book. But there is also assassination.
War is fought by fleets or squadrons or task forces, but at the end of the fight, it comes down to the two admirals meeting on the deck of a capital ship, surrounded by smoking hulls, for a duel to preserve honor. Or it comes down to a world surrendering on the terms of the intruder.
Economics could be a mix of Interpersonals (legislating taxes, for instance) and fleet or squadron actions (tradewar and interdiction).
But page 404 says the economic extension allows the calculation of RU's for a world in effect creating a world budget.
So there is a direct link between RU's and the numbers of Battalions and Capital ships deployed by a world.
Kind Regards
David